A multi-stage pressure relief explosion valve
Patent Information
- Application Number
- CN202522526515.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-27
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-27
AI Technical Summary
Existing pressure relief explosion-proof valves use a single pressure relief method, resulting in excessively fast pressure relief, which can easily cause equipment damage or personal injury. Furthermore, they cannot be graded and controlled according to system pressure, failing to meet the pressure relief requirements under different operating conditions.
Design a multi-stage pressure relief explosion-proof valve. Through a graded pressure relief method with a primary pressure relief channel and a secondary pressure relief channel, the valve achieves graded opening action by using a sealed valve stem, spring support and linkage mechanism to control the pressure relief speed and pressure, and adopts a limit device to prevent over-opening.
It effectively controls the pressure relief rate, avoids equipment damage and personal injury, meets the pressure relief needs under different working conditions, has a simple structure, is easy to manufacture and maintain, and has a long service life.
Smart Images
Figure CN224932234U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pressure relief and explosion prevention technology, specifically a multi-stage pressure relief and explosion prevention valve. Background Technology
[0002] Most existing pressure relief explosion-proof valves use a single pressure relief method. When the system pressure exceeds the set value, the valve will open completely at once, resulting in excessively rapid pressure relief, which can easily cause equipment damage or personal injury. In addition, the single pressure relief method cannot provide tiered control according to different system pressures, and cannot meet the pressure relief requirements under different operating conditions. Based on the above, this utility model proposes a multi-stage pressure relief explosion-proof valve, which can effectively solve the above problems. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a multi-stage pressure relief explosion-proof valve. By using a staged pressure relief method, it effectively controls the pressure relief rate, avoiding equipment damage and personnel injury. At the same time, it can perform staged control according to different system pressures to meet the pressure relief requirements under different operating conditions.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A multi-stage pressure relief explosion-proof valve includes a main body shell and has an inlet flange, an outlet flange and a pressure relief flange;
[0006] A two-stage pressure relief shell is detachably connected to the top of the pressure relief flange for relieving pressure.
[0007] The two-stage pressure relief shell has a primary pressure relief channel at the top and a secondary pressure relief channel on the side wall.
[0008] A primary sealing assembly is located in the middle of the two-stage pressure relief shells. It includes a sealing valve stem, which is elastically engaged with the two-stage pressure relief shells by a primary spring.
[0009] The secondary sealing assembly is slidably inserted into the inner wall of the two-stage pressure relief shell and elastically engaged with the two-stage pressure relief shell through secondary spring support;
[0010] A linkage mechanism is located at the bottom of the sealing valve stem, through which the sealing valve stem realizes the graded opening action of the primary sealing component and the secondary sealing component.
[0011] This utility model's multi-stage pressure relief explosion-proof valve can effectively control the pressure relief rate through a graded pressure relief method, avoiding equipment damage and personnel injury; it can be graded according to different system pressures to meet the pressure relief requirements under different working conditions; it has a simple structure, is easy to manufacture and maintain, and uses springs for mechanical support and linkage mechanism, resulting in high reliability and long service life.
[0012] Preferably, the main housing is installed on the pressure relief pipeline via an inlet flange and an outlet flange.
[0013] Preferably, the number of the secondary pressure relief channels is at least three, and they are arranged in a ring on the sidewalls of the two-stage pressure relief shells. The secondary sealing assembly is a circular valve disc.
[0014] Preferably, when the annular valve disc is located at the bottom of the two-stage pressure relief shell, it can shield the secondary pressure relief channel. The top and bottom of the outer wall of the annular valve disc are also provided with sealing strips that abut against the two-stage pressure relief shell to form a sealed state.
[0015] Preferably, the linkage mechanism includes a T-shaped guide rod fixedly connected to the bottom of the sealing valve stem, wherein the bottom diameter of the T-shaped guide rod is larger than the through hole in the middle of the annular valve disc.
[0016] Preferably, a limiting device is provided on the inner wall of the primary pressure relief channel to limit the maximum opening stroke of the sealing valve stem and prevent the sealing valve stem from being over-opened and damaged. The side wall of the limiting device is also provided with a through groove.
[0017] Preferably, the opening stroke of the sealing valve stem is less than the opening stroke of the secondary sealing assembly to achieve graded control of primary and secondary pressure relief. When the system pressure exceeds the set value, the sealing valve stem first opens slightly to perform primary pressure relief, and then drives the secondary sealing assembly to fully open through the linkage mechanism to perform secondary pressure relief.
[0018] Preferably, the side wall of the sealing valve stem has a plug cone, the side wall of which has a circular groove and a sealing ring is engaged with the inner wall of the circular groove to close the middle channel of the two-stage pressure relief shell.
[0019] This utility model provides a multi-stage pressure relief explosion-proof valve. It has the following beneficial effects:
[0020] 1. Staged pressure relief: Staged pressure relief can effectively control the pressure relief rate, avoid equipment damage and personal injury. The limit device restricts the maximum opening stroke of the sealing valve stem, preventing the valve from being damaged or malfunctioning due to excessive opening, and further ensuring system safety.
[0021] 2. Graded control: Graded control can be implemented according to different system pressures to meet the pressure relief requirements under different operating conditions.
[0022] 3. Staged pressure relief reduces wear: Because the pressure relief rate is effectively controlled, wear on valves and piping systems is reduced, extending the service life of the equipment. Attached Figure Description
[0023] Figure 1 This is a three-dimensional overall structural diagram of the multi-stage pressure relief explosion-proof valve of this utility model;
[0024] Figure 2 This is a side view of the multi-stage pressure relief explosion-proof valve of this utility model.
[0025] Figure 3 This is a partially cutaway structural diagram of the multi-stage pressure relief explosion-proof valve of this utility model;
[0026] Figure 4 This is a cross-sectional structural diagram of the multi-stage pressure relief explosion-proof valve of this utility model;
[0027] Figure 5 This is a schematic diagram of the structure of the primary sealing assembly described in this utility model.
[0028] In the diagram, 1 is the main shell; 11 is the inlet flange; 12 is the outlet flange; and 13 is the pressure relief flange.
[0029] 2. Two-stage pressure relief shell; 21. Primary pressure relief channel; 22. Secondary pressure relief channel;
[0030] 3. Primary sealing assembly; 31. Sealing valve stem; 32. Primary spring support; 33. Limiting device; 34. Sealing ring; 35. Plug cone;
[0031] 4. Secondary sealing assembly; 41. Secondary spring support;
[0032] 5. Linkage mechanism. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] Example:
[0035] like Figure 1-5 As shown, this utility model embodiment provides a multi-stage pressure relief explosion-proof valve, including a main body shell 1, having an inlet flange 11, an outlet flange 12 and a pressure relief flange 13;
[0036] Two-stage pressure relief housing 2 is detachably connected to the top of pressure relief flange 13 for relieving pressure;
[0037] The two-stage pressure relief shell 2 has a primary pressure relief channel 21 at the top and a secondary pressure relief channel 22 on its sidewalls.
[0038] The primary sealing assembly 3 is located in the middle of the two-stage pressure relief shell 2. It includes a sealing valve stem 31, which is elastically engaged with the two-stage pressure relief shell 2 through a primary spring support 32.
[0039] The secondary sealing assembly 4 is slidably inserted into the inner wall of the two-stage pressure relief shell 2 and elastically engaged with the two-stage pressure relief shell 2 through the secondary spring support 41;
[0040] The linkage mechanism 5 is located at the bottom of the sealing valve stem 31. The sealing valve stem 31 realizes the staged opening action of the primary sealing component 3 and the secondary sealing component 4 through the linkage mechanism 5.
[0041] Because of the above structure, the multi-stage pressure relief explosion-proof valve of this utility model can achieve graded pressure relief: By using graded pressure relief, the pressure relief rate can be effectively controlled, avoiding equipment damage and personnel injury. Graded control: Graded control can be performed according to different system pressures to meet the pressure relief requirements under different operating conditions. Simple structure: The structure is simple, easy to manufacture and maintain, and uses spring support and a linkage mechanism, resulting in high reliability and a long service life.
[0042] Specifically, when the system pressure is lower than the set value, both the primary sealing component 3 and the secondary sealing component 4 are in the closed state, and the system operates normally.
[0043] When the system pressure exceeds the set value, the sealing valve stem 31 stretches the first-stage spring support 32, overcomes the elastic potential energy of the first-stage spring support 32, moves upward, opens the first-stage pressure relief channel 21, and performs primary pressure relief.
[0044] As the system pressure continues to rise, when it exceeds the set value of two, the linkage mechanism 5 drives the secondary sealing component 4 to move upward, opening the secondary pressure relief channel 22 to perform secondary pressure relief.
[0045] Once the system pressure returns to normal, the primary sealing assembly 3 and the secondary sealing assembly 4 automatically close under the action of the primary spring support 32 and the secondary spring support 41, respectively, thus ending the pressure relief process.
[0046] Furthermore, in another embodiment, the main housing 1 is mounted on the pressure relief pipeline via an inlet flange 11 and an outlet flange 12.
[0047] Because the multi-stage pressure relief explosion-proof valve of this utility model has the above structure, the flange facilitates the installation and disassembly of the main body shell 1.
[0048] Furthermore, in another embodiment, the number of secondary pressure relief channels 22 is at least three, and they are arranged in a ring on the sidewalls of the two-stage pressure relief shell 2, and the secondary sealing assembly 4 is a circular valve disc.
[0049] When the annular valve disc is located at the bottom of the two-stage pressure relief shell 2, it can block the secondary pressure relief channel 22. The top and bottom of the outer wall of the annular valve disc are also provided with sealing strips that abut against the two-stage pressure relief shell 2 to form a sealing state.
[0050] The linkage mechanism 5 includes a T-shaped guide rod fixedly connected to the bottom of the sealing valve stem 31. The bottom diameter of the T-shaped guide rod is larger than the through hole in the middle of the annular valve disc.
[0051] Because the multi-stage pressure relief explosion-proof valve of this utility model has the above structure, the circular valve disc can simultaneously shield multiple secondary pressure relief channels 22 to achieve synchronous opening and closing. The outer wall of the circular valve disc has a sealing strip, which can achieve a sealing state when the circular valve disc is closed, without affecting the normal use of the original equipment. The T-shaped guide rod can abut against the secondary sealing component 4 after the sealing valve rod 31 rises to a certain height, and pull the secondary sealing component 4 to achieve the opening and closing action.
[0052] Furthermore, in another embodiment, a limiting device 33 is provided on the inner wall of the first-stage pressure relief channel 21 to limit the maximum opening stroke of the sealing valve stem 31 and prevent the sealing valve stem 31 from being over-opened and damaged. The side wall of the limiting device 33 is also provided with a through groove.
[0053] The opening stroke of the sealing valve stem 31 is less than that of the secondary sealing assembly 4, thus achieving graded control of primary and secondary pressure relief. When the system pressure exceeds the set value, the sealing valve stem 31 first opens slightly to perform primary pressure relief, and then drives the secondary sealing assembly 4 to fully open through the linkage mechanism 5 to perform secondary pressure relief.
[0054] Because the multi-stage pressure relief explosion-proof valve of this utility model has the above structure, the middle part of the limiting device 33 has a sliding hole, so that the sealing valve stem 31 can be effectively slidably inserted into the limiting device 33 to maintain the stability of the sealing valve stem 31. At the same time, due to the existence of the linkage mechanism 5, when the sealing valve stem 31 moves to a certain extent, it can be linked with the secondary sealing component 4 through the linkage mechanism 5.
[0055] Furthermore, in another embodiment, the side wall of the sealing valve stem 31 has a plug cone 35, the side wall of the plug cone 35 has a circular groove, and a sealing ring 34 is engaged in the inner wall of the circular groove to close the middle channel of the two-stage pressure relief shell 2.
[0056] Because the multi-stage pressure relief explosion-proof valve of this utility model has the above structure, the plug cone 35 has an inclined surface, which facilitates the formation of an effective contact seal. It further cooperates with the sealing ring 34 to form a further sealing state and ensure the stability of the seal.
[0057] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.
[0058] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0059] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A multi-stage pressure relief explosion-proof valve, characterized in that: include: The main body shell (1) has an inlet flange (11), an outlet flange (12) and a pressure relief flange (13); A two-stage pressure relief shell (2) is detachably connected to the top of the pressure relief flange (13) for relieving pressure; The two-stage pressure relief shell (2) has a primary pressure relief channel (21) at the top and a secondary pressure relief channel (22) on the side wall. A primary sealing assembly (3) is located in the middle of the two-stage pressure relief shell (2), and includes a sealing valve stem (31), which is elastically engaged with the two-stage pressure relief shell (2) by a primary spring support (32); The secondary sealing assembly (4) is slidably inserted into the inner wall of the two-stage pressure relief shell (2) and elastically engaged with the two-stage pressure relief shell (2) by a secondary spring support (41); The linkage mechanism (5) is located at the bottom of the sealing valve stem (31). The sealing valve stem (31) realizes the graded opening action of the primary sealing component (3) and the secondary sealing component (4) through the linkage mechanism (5).
2. The multi-stage pressure relief explosion-proof valve according to claim 1, characterized in that: The main housing (1) is installed on the pressure relief pipeline via an inlet flange (11) and an outlet flange (12).
3. The multi-stage pressure relief explosion-proof valve according to claim 1, characterized in that: The number of the secondary pressure relief channels (22) is at least three, and they are arranged in a ring on the side wall of the two-stage pressure relief shell (2). The secondary sealing assembly (4) is a circular valve disc.
4. The multi-stage pressure relief explosion-proof valve according to claim 3, characterized in that: When the annular valve disc is located at the bottom of the two-stage pressure relief shell (2), it can shield the secondary pressure relief channel (22). The top and bottom of the outer side wall of the annular valve disc are also provided with sealing strips that abut against the two-stage pressure relief shell (2) to form a sealed state.
5. A multi-stage pressure relief explosion-proof valve according to claim 4, characterized in that: The linkage mechanism (5) includes a T-shaped guide rod fixedly connected to the bottom of the sealing valve stem (31), and the bottom diameter of the T-shaped guide rod is larger than the through hole in the middle of the annular valve disc.
6. The multi-stage pressure relief explosion-proof valve according to claim 1, characterized in that: The inner wall of the first-stage pressure relief channel (21) is provided with a limiting device (33) to limit the maximum opening stroke of the sealing valve stem (31) and prevent the sealing valve stem (31) from being over-opened and damaged. The side wall of the limiting device (33) is also provided with a through groove.
7. A multi-stage pressure relief explosion-proof valve according to claim 6, characterized in that: The opening stroke of the sealing valve stem (31) is less than that of the secondary sealing assembly (4) to achieve graded control of primary pressure relief and secondary pressure relief. When the system pressure exceeds the set value, the sealing valve stem (31) first opens a small stroke to perform primary pressure relief, and then drives the secondary sealing assembly (4) to fully open through the linkage mechanism (5) to perform secondary pressure relief.
8. A multi-stage pressure relief explosion-proof valve according to claim 7, characterized in that: The side wall of the sealing valve stem (31) has a plug cone (35), the side wall of which has a circular groove and a sealing ring (34) is engaged in the inner wall of the circular groove to close the middle channel of the two-stage pressure relief shell (2).